Hmm, that's not so good. It's also rather strange, because I and others have been able to play it through all the way to the end without any issues. If it's a bug it must be a really obscure one — or perhaps the console crashed for some unrelated reason? I'd need a save file in the vicinity of that scene to be able to test it. I was glad to see you were enjoying the project apart from that, anyway. I could tell you'd picked up on several of the story elements and subtleties which had previously been lost due to mistranslation, so that told me I'd done my job properly.
I'm currently in the process of updating the project again to fix some minor remaining issues, and to give it a little more polish. For now it's still going to be based on the US version because it's easier to work with, but I do like the idea of porting this script directly into the Japanese game. I don't know exactly how to go about doing that currently, but if there does turn out to be a relatively painless way of making it happen, I would.